BUG 2112: Workaround for missing flows in POC demo.

This is an update for BUG 2112 -- it adds comments explaining the
change and configures the vswitch to support 1.0, 1.2, and 1.3.

Change-Id: Ifdcdbfe3110e6ed63f69ea232126174a546a1a89
Signed-off-by: Thomas Bachman <tbachman@yahoo.com>
(cherry picked from commit 6b1c8055c2ffccabc8416547c8c8128e4717f5f8)